package org.example.iris.interceptors;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.example.iris.utils.JwtUtil;
import org.example.iris.utils.ThreadLocalUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Map;

// 拦截器
@Component
public class LoginInterceptor implements HandlerInterceptor {

    @Autowired
     private StringRedisTemplate stringRedisTemplate;

    @Override
    public boolean preHandle( // 拦截请求
            HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
            String token = request.getHeader("Authorization");
            try{
                // 从redis中获取token
                ValueOperations<String, String> ops = stringRedisTemplate.opsForValue();
                String redisToken = ops.get(token);
                if (redisToken == null) {
                    throw new RuntimeException();
                }

                Map<String, Object> claims = JwtUtil.parseToken(token);
                ThreadLocalUtil.set(claims);
                return true;
            }catch (Exception e){
                response.setStatus(401);
                return false;
            }
    }

    @Override
    public void afterCompletion( // 请求完成后
            HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
            ThreadLocalUtil.remove();
    }
}
